First step of refactoring code (ccnx prefix => ndn prefix)
diff --git a/model/ndn-net-device-face.cc b/model/ndn-net-device-face.cc
new file mode 100644
index 0000000..7baa363
--- /dev/null
+++ b/model/ndn-net-device-face.cc
@@ -0,0 +1,132 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2011 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ *
+ */
+
+#include "ndn-net-device-face.h"
+#include "ndn-l3-protocol.h"
+
+#include "ns3/net-device.h"
+#include "ns3/log.h"
+#include "ns3/packet.h"
+#include "ns3/node.h"
+#include "ns3/pointer.h"
+
+#include "ns3/point-to-point-net-device.h"
+#include "ns3/channel.h"
+#include "ns3/ndn-name-components.h"
+
+NS_LOG_COMPONENT_DEFINE ("NdnNetDeviceFace");
+
+namespace ns3 {
+
+TypeId
+NdnNetDeviceFace::GetTypeId ()
+{
+  static TypeId tid = TypeId ("ns3::NdnNetDeviceFace")
+    .SetParent<NdnFace> ()
+    .SetGroupName ("Ndn")
+    ;
+  return tid;
+}
+
+/** 
+ * By default, Ndn face are created in the "down" state.  Before
+ * becoming useable, the user must invoke SetUp on the face
+ */
+NdnNetDeviceFace::NdnNetDeviceFace (Ptr<Node> node, const Ptr<NetDevice> &netDevice)
+  : NdnFace (node)
+  , m_netDevice (netDevice)
+{
+  NS_LOG_FUNCTION (this << netDevice);
+
+  SetMetric (1); // default metric
+
+  NS_ASSERT_MSG (m_netDevice != 0, "NdnNetDeviceFace needs to be assigned a valid NetDevice");
+}
+
+NdnNetDeviceFace::~NdnNetDeviceFace ()
+{
+  NS_LOG_FUNCTION_NOARGS ();
+}
+
+NdnNetDeviceFace& NdnNetDeviceFace::operator= (const NdnNetDeviceFace &)
+{
+  return *this;
+}
+
+Ptr<NetDevice>
+NdnNetDeviceFace::GetNetDevice () const
+{
+  return m_netDevice;
+}
+
+void
+NdnNetDeviceFace::RegisterProtocolHandler (ProtocolHandler handler)
+{
+  NS_LOG_FUNCTION (this);
+
+  NdnFace::RegisterProtocolHandler (handler);
+  
+  m_node->RegisterProtocolHandler (MakeCallback (&NdnNetDeviceFace::ReceiveFromNetDevice, this),
+                                   NdnL3Protocol::ETHERNET_FRAME_TYPE, m_netDevice, true/*promiscuous mode*/);
+}
+
+bool
+NdnNetDeviceFace::SendImpl (Ptr<Packet> packet)
+{
+  NS_LOG_FUNCTION (this << packet);
+  
+  NS_ASSERT_MSG (packet->GetSize () <= m_netDevice->GetMtu (), 
+                 "Packet size " << packet->GetSize () << " exceeds device MTU "
+                 << m_netDevice->GetMtu ()
+                 << " for Ndn; fragmentation not supported");
+
+  bool ok = m_netDevice->Send (packet, m_netDevice->GetBroadcast (), 
+                               NdnL3Protocol::ETHERNET_FRAME_TYPE);
+  return ok;
+}
+
+// callback
+void
+NdnNetDeviceFace::ReceiveFromNetDevice (Ptr<NetDevice> device,
+                                         Ptr<const Packet> p,
+                                         uint16_t protocol,
+                                         const Address &from,
+                                         const Address &to,
+                                         NetDevice::PacketType packetType)
+{
+  NS_LOG_FUNCTION (device << p << protocol << from << to << packetType);
+  Receive (p);
+}
+
+
+std::ostream&
+NdnNetDeviceFace::Print (std::ostream& os) const
+{
+  os << "dev[" << GetNode ()->GetId () << "]=net(" << GetId () << ",";
+  os << DynamicCast<PointToPointNetDevice> (m_netDevice)->GetChannel ()->GetDevice (0)->GetNode ()->GetId ();
+  os << "-";
+  os << DynamicCast<PointToPointNetDevice> (m_netDevice)->GetChannel ()->GetDevice (1)->GetNode ()->GetId ();
+  os << ")";
+  return os;
+}
+
+}; // namespace ns3
+